Drain inlet



p 4, 193 c. E, D'REHMANN 1,972 513 DRAIN INLET Filed May 25, 1953 2 Sheets-Sheet 2 Gfirimlinn 5.012%

Patented Sept. 4, 1934 UNITED STATES PATENT eer e-E 'DNRAINI'NLET v, Christian E. Drehmann, Philadelphia, Pa. Application May 23, 193 SeriaLNo 672,414

' 6'Claims. "(01. 182-31) Drainage inlets in floors are used'when these floors are flushed into drains located'beneath them, and also when for any reason, in the washing of these fioors the wash water cannot be disposed of conveniently .at a side of the floors surface, or by gutters leading away from it.

These inlets are subject to a number of requirements, some or all of which may be incidental to particular drainage or flooring conditions,

10, amongst whichrmay be mentioned:the easy accessibility of the parts of the drain inlet for removal and replacement, which may be required either through the necessity for cleaning out the inlet or the drain, or the removal of a broken 15, part and its replacement; the convenience of setting so that the pipe may be set as the building is being constructed and the inlet installed after. the construction has progressed without disturbing or cutting any previous construction;

f the positioning of the inlet so that it will not be displaced or broken by the passage of a heavy weightover it, such as a wheel of a heavytruck, or ofier an objectionable amount of obstruction to such a passage.

My inlet can be installed after the drainage proper has been laid, and the inlet adjusted to the floor level, regardless of minor irregularities in the height or the perpendicularity of any drain pipe supposed to be vertical.

? The device comprises two separate elements, a lower pct that rests upon the floor, and a system of strainers that are-removable. One of these is at the level of the completed floor and the other'at the top of the pot... The bottom of the.

pot has a socket that fits loosely over a vertical drainage pipe, and a packing completes the joint between them. The pot has means for securing to it a water proofing floor layer, so that the water seeping down through the fioor to the layer 'will be di charged into the pot. A horizontal lug consiructionadded to the pot with a rim preventing the outward flow of this water over which the water proofing extends, a particular form of M which is described in the description of the. best form of my invention, serves this purpose. The construction lends itself to a very cheap but still strong construction, for the pot with its somewhat elaborated'form can be cast and,,lying entirely out of the Way of any blow, while thebox. en-

closing and protecting the upper strainer is very simple in form, and can be made readily from wrought iron. The floor may readily be laid in layers, the lower or supporting layer may be 5;;of wood, cement, or any other suitable material,

over this may be laid the water proofinet: and on this a finishing fioor may be laid.

Describing now the best form of which I am at. present awarev of embodying my invention:;

Fig. l is a plan showing the metal portions of the device, viewed from above. Fig. 2 is asection of this portion of my device on the line 2-2, together with the co-operating portions of the floor in which the metallic portions of. the drain are set. Fig. 3 is a plan view of the lower strain- 6 er, shown slightly modified from the form shown in Fig. 2. Fig. 4 is a section online 4--4 of Fig. 3: Fig. 5 is a planview of the upper strainer, which is slightly modifiedfrom the form shown in Figures 1 and 2. Fig. 6 is a sectional View on the line 6-6 of Fig. 5., Fig. 7 is a view of a lower strainer in a somewhat different form from that shown in the other figures, and Fig. 8- isa; section on the line 8-8 of Fig. 7.

Drain pipes ordinarily are set in place before I5 the cement is poured, in new buildings and, when a drainage system is to be installed in an old building, the pipes are run usually, and the inlets opening in the floor are cut for the admission of the cess, or drainage inlets previous to 8 beginning the installation of the latter. See Figs. 1 and 2, I have indicated the upper ends of the pipes of tl'iedrainagesystem by 1. Around this pipe is positioned the lower end of the .pot, 201? the drainage inlet. This end of the pot 2 has a socket 3 that fits loosely over the pipe 1, so that it may be adjusted upon it. Frequently the piping 1 is out of the vertical and also varies'in height relatively to the flushing surface of the fioor. The pot 2 is set over the pipe l, so that, when the fiooris finished the top strainer 5 will be flush with the top surface of the floor. The caulking 6 is placed between the inside of the-socket 3 andthe outside. of the pipel. I provide a positioning means: for holding the'caulking in place, such as the annular groove .7 placed in the interior of the caulking. The loose fitting of the socket 3 and the expedient of the positioned calking, enables any irregularity of height of the pipe 1', or-any; variation from perpendicularity of the pipe 1 to be compensated for in the positioning of the pot 20verit. v The pot 2 is supported'in a layer floor 11 that is strong enough to carry it. I place a water proofing material above this floor so as to divert all water fromithe upper portions ofthe fioor ing to the interior of the pot 2, and I seal this water proofing to the pot 2. V

The portion of the floor llthat supports the pot 2, I may make advantageously, of a body of cement that fits the outside of the pot 2. The pot 2 has a lug 12 extending outward. This lug should preferably lie in the flooring 11 and a drainage space a, the outside wall of which may may be formed of a rim 15 that extends upward from the edge of the lug 12. It is best that the top of this rim lie on a level with the top of the flooring 11. i a

An inner wall 14 of this chamber may be provided with passages as b, for the flow of water toward the basin part of the pot 2; it may also be formed by ridges, separated from each other positioned on the lug 12. The entire pot 2, may 5 be cast in an integral casting and of cheap iron, as it is removed from danger of receiving blows. The water proofing protection given to the lower flooring 11, may be provided by a layer of water proofing material 9, which is laid over the flooring material 11, and extends over the top of the rim 15. This layer may be one or more layers of asphalt paper or may be made of any other suitable material. The bowl of the y, pot 2 has a support for the lower strainer 20. This support may be a notch 19. The strainer 20 preferably has feet formed of a downward projecting rim 22. The strainer 20 is perforated, but the holes may vary. They may be round holes 24, 24 on one side, and elongated holes 26, 26 on the other side of the strainer, or either form of perforations may be used exclusively.

The box or retainer extends completely around the mouth of the drain, and its top is preferably exactly flush with the top of the 35 7 finished floor. It rests on the pot 2 and has passages for the passage of water through it inwardly toward the pot 2. Itsbottom edge may rest on the lug 12, inside the inner wall 15 of the chamber on the lug 12. This box 35 may be made from a piece of flat steel or wrought iron,

bent into square shape.

I build the finishing fioor usually in two strata, the lower 30% of cement, preferably with a large I sand component and the upper layer of the floor 31 of a paving brick, secured together by cement. The upper strainer 40 has supports that are supported fromthe pot 2. Preferably they rest on the lug 12. These supports may be legs 43 (shown in Fig. 2). The horizontal plate 46 of 50 'this strainer is of less area than the area enclosed by the box 35, leaving a space between its edges and the walls of the box 35 that admits water from the surface of the floor and permits the easier withdrawal of the strainer 40. This strainer is shown perforated into a series of rectangular slots in Fig. 1, a series of such slots at one side and a series of circular perforations at the other, in Figs. 5 and 6.

A modified form of the lower straineris shown in Figs. 7 and 8. This form is especially useful where a large amount of sludge is in the waste water drained oil, and it has means for retaining the sludge, instead of allowing it to go into the pipe l. The bottom of this form of inner strainer has a substantially iniperforated cup 110, that This structure permits the sludge to collect in and hence the device is readily cleaned, and (these parts are the ones exposed to breakage), if either of them are broken, they can be replaced readily. The casting forming the pot 2, the main portion of the device, is well out of the way. The only stationary and fixed parts exposed to breakage is the box 35, which may be made of wrought lI'OIl.

Many changes may be made in the form in which my invention may be embodied, without departing from my invention, and therefore the detailed description above is not to be taken as limiting my invention to less than is designated by the terms of the claims.

I claim 1. A drain inlet'comprising a pot of brittle iron located beneath the surface of a floor, having a seat for a drain plate, a loose socket for a drain pipe in the lower portion of the pot, in combination with a protecting case level with the floor, and solidly secured thereto, formed of a forged iron, and a drain plate having supports resting on the pot and extending to a point near the level of the fioor.

2. In a drain inlet adapted for use in buildings where a system of drain pipes are positioned beneath the fioor inwhich the drain inlet is positioned, a pot having at its bottom a wide opening adapted to fit over an upright pipe of said system and to be secured and sealed thereto by a lead caulking, said opening being provided with a key for said lead caulking, consisting of an annular groove extending around the inside of said hole, and sunk into the side walls of said opening.

3. A drain inlet in a floor comprising a pot positioned wholly below the surface of the finished floor, a box positioned above the pot with its upper edge fiush with the surface of the finished fioor, and a removable strainer placed on the pot and a removable strainer fitting loosely in the box and provided with legs resting on the top of said pot. a

4. A drain inlet positioned in the floor of a building and adapted to collect also the seepage from the intermediate portions of the floor and convey its drainage into the drainage system, comprising a stationary pot provided with horizontal lugs extending beneath the adjacent portion of the intermediate portions of the floor, a lower strainer placed in said pot below the lugs, a hole in the lower portion of the pot fitting loosely over an upright pipe of the drainage systern and caulked tightly around the same, a box of tough metal distinct from the pot and positioned above it and extending to substantially the floor level, and a removable upper strainer having feet resting on the pot and deep enough to extend from the pot to the floor level.

5. A drain inlet set in the floor of a building comprising a pot, a removable lower strainer positioned in this pot, anda box of a tough metal having vertical sides above the pot with its upper edge substantially flush with the upper surface of the floor, said pot being composed of brittle metal and having drainage inlets leading into the pot and outlets from the pot into the drainage system.

6. The device as defined in claim 4, wherein the lugs extending horizontally from the top of the pot have at their periphery a raised rim that is placed beneath the waterproofing layer.

CHRISTIAN E. DREHMANN. 

